42315971 has 4 divisors (see below), whose sum is σ = 42335712. Its totient is φ = 42296232.

The previous prime is 42315967. The next prime is 42315979. The reversal of 42315971 is 17951324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42315971 - 2² = 42315967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42315979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200 + ... + 11093.

It is an arithmetic number, because the mean of its divisors is an integer number (10583928).

Almost surely, 2^42315971 is an apocalyptic number.

42315971 is a deficient number, since it is larger than the sum of its proper divisors (19741).

42315971 is a wasteful number, since it uses less digits than its factorization.

42315971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19740.

The product of its digits is 7560, while the sum is 32.

The square root of 42315971 is about 6505.0727128911. The cubic root of 42315971 is about 348.4721730569.

The spelling of 42315971 in words is "forty-two million, three hundred fifteen thousand, nine hundred seventy-one".